Crystal 2D
-----------
A small, super-easy-to-use , which has a Rails-like API, 2D game engine made using Crystal and SDL.
Example
--------
This renders "char_1_side.png" and moves it if A is pressed, and closes upon receiving a close or a escape key press event:
```
require "sdl2"
require "./sdlFix"
require "./crystal2d"
class MyGame < Crystal2d::App
define_signals :is_running, LibSDL2::Key::ESCAPE, Toggle,
:is_running, SDL2::EventType::QUIT, Toggle,
:should_move, SDL2::Scancode::A, OnOff
def on_init
@spr = Crystal2d::Sprite.new("char_1_side.png",0)
end
def on_game_frame(timestep)
@spr.x =@spr.x + 100*timestep if @should_move
end
end
MyGame.new.run
```
Note: "sdlFix.cr" is just a (temporary) patch to the existing SDL2 library